Do Kyung Soo, better known by his stage name D.O., is a South Korean singer and actor. He is a member of the South Korean-Chinese boy group "EXO" as one of the main vocalists and is also the main vocalist of "EXO-K". D.O. has been singing since primary school and was an avid participant in local singing competitions throughout his high school career. In 2010, he was recommended to audition for S.M. Entertainment after winning at a local singing festival. He subsequently became an S.M. Entertainment trainee during his last two years of high school.
D.O. made his acting debut in the movie "Cart". He also sang the OST "Crying Out" for the movie. D.O. was ranked number one by critics among 40 idol-actors who participated in dramas in 2014.